Lock with coacting latch and dead lock bolts



June 7, 1966 'r. TUCKER 3,254,518

LOCK WITH COAC'IING LATCH AND DEAD LOCK BOLTS Filed March 2'7, 1964 \L l I 5 L- I 7%: 55 4 INVEN TOR. THEODORL' 77/CKL'R f7 TTOR/VE Y United States Patent 3,254,518 LOCK WITH COACTING LATCH AND DEAD LOCK BOLTS Theodore Tucker, 1840 13th St., Brooklyn, N.Y. Filed Mar. 27, 1964, Ser. No. 355,261

13 Claims. (Cl. 70-107) This invention relates to door locks and the like employ-ing a combination latch and dead lock bolt with manually operated means for actuating the latch ilJOlt and with key and manually actuated means for operating the dead lock bolt. More particularly, the invention deals with a lock structure of the character defined, wherein a coacting bar is employed operatively engaging both bolts in retention of said bolts in locked position.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed .and, in which, the separate parts are designated by. suitable reference characters in each of the views and,'in which:

FIG. 1 is a sectional view through parts of a door and doorjarrrb, with parts of the construction broken away, the section being substantially on the line 11 of FIG. of the drawing, the latch and lock bolts being shown in operative position in full lines and the lock ibolt illustrated in another position, in part, in dotted lines.

FIG. 2 is a view, generallysimilar to FIG. 1, showing.

the casing of the lock detached and illustrating both bolts in retracted position.

FIG. 3 is a partial section substantially on the line 3-3 of FIG. 1 and diagrammaticallyillustrating the background showing of part of the lock structure.

FIG. 4 is a partial section on the slightly ofiset line 44 of FIG. 1.

FIG. 5 is a section on the line 5-5 of FIG. 2 and illustrating part of the door; and

FIG. 6 is a partial section on the broken line 6-6 of FIG. 1 showing only the lock casing detached.

In FIG. 1 of the drawing, I have shown, in part, at 10 a door and at 11 part of the doorjamb of the door- -frame. At -12 is shown the casing of a lock, the casing including a cover 13, note FIGS. 4, 5 and 6, held in place by a plurality of screws, part of which are shown in section, at 14 in FIG. 1 of the drawing.

The lock 12 has a facing plate 15 recessed in the edge portion of the door and secured to the door by screws .16.

The plate has apertures 17 and 18 therein for free passage of a latch bolt 19 and the dead lock bolt 20 there'through. At 21 is shown a striker plate secured to the surface of the doorjamb 11 .by screws 22, the striker plate having apertures 23 and 24 to freely receive the bolts 19 and 20, respectively, as clearly noted in FIG. 1 of the drawing. The plate 21 includes a projecting striker 25, shown in FIG. 3, over which the latch bolt 19 passes in moving said bolt inwardly against the action of a coil spring 26 in the operation of moving .the door 10 into closed position.

I The operating end of the bolt 19 is generally of conventional construction, as seen in cross-section in FIG. 5 of the drawing, and extending inwardly from the bolt is a bar portion 27, the bar having enlarged portions, as at 2'8 and 29, for guidance of the bolt between the wall 30 of the casing .12 and the plate 13, as will clearly appear from a consideration of FIG. 5. This construction forms recesses on opposed sides of the bar portion 27, one of these recesses being shown at 31 and another recess being shown at 32. The recess 31 is at the outer portion of the bolt and, in this outer portion, the bar 27 has an elongated aperture 33, in which the spring 26 is mounted, the spring seating in a recessed portion 34 in the inner surface of the bolt proper, as clearly illustrated in the secice.

tional portion of FIG. 1. Secured to the wall 30 is a pin 35 having a flattened side surface 36, note FIG. 1. The inner end of the spring 26 operates upon the flat surface of the pin 35. This pin 35 guides the bolt 19 in its inward and outward movement. The outer end portion of the bolt is further guided by the portion 37 of the casing and a guide pin 38 fixed to the wall 30, as clearly illustrated in FIG. 2 of the-drawing.

Suitably mounted in the wall 30 of the casing and the plate 13, as well as in the door 10, is a square rod or spindle 39 projecting through inner and outer surfaces of the door and having doorknobs fixed thereto, a part of the inner doorknob 40 and part of the outer doorknob 41 being shown in FIG. .3 of the drawing. These structures are old and well-known in the art and, for this reason, are not illustrated in any detail. They serve to manually move the latch bolt -19 into inoperative position in the operation of opening a door.

Fixed to the spindle 3-9, within the casing 10, is a curved lever 42, 'which operates in the recess 32 of the bar portion '27 .and. fixed to the bar portion and projecting into the recess 32 is a pin'43 engaged lay the lever 42 in support of the latch bolt 19 in the projected operative position when the dead lock bolt 20 is in the fully retracted position shown inFIG. 2. In other words, if, for any reason the spring 26 has not automatically projected the latch bolt into operative position, operation of one of the doorknobs 40, 41 will assure movement of the latch bolt into locked position. The latch bolt is moved into inoperative position, shown in FIG. 5 of the drawing, by operation of either one 'of the doorknobs 40, 41 and this is accomplished by action of the lever 42 upon the wall of 29, as will clearly appear from a consideration of FIG. 2 of the drawing, in which figure, the latch bolt has been moved inwardly, so as to facilitate opening of the door. It will be apparent that, upon release of manual operation of the doorknob, the latch bolt will automatically return to operative position by action of the spring 26.

The wall 30 of the casing 10 has, centrally of the inner surface thereof, an elongated aperture 44 with a block 45 at one end thereof to provide a positive check for movement of a bolt actuating slide 46in one direction. One surface of the slide has a portion 47 operating in the groove 44, as will appear from a consideration of FIGS. 4 and 6 of the drawing, and the inner end portion of the slide is enlarged to form laterally extending flanges 48 which overlie the wall 30, as clearly noted in FIG. 6 of the drawing. The inner end portion of .the slide 46 has an elongated aperture 49 in which operates a pin 50 at one end of a lock bolt actuating lever 51 suitably fixed to a key and doorknob operating portion of a key cylinder which, for simplification, is outlined in dot-dash lines at 52 in FIGS. 1 and 2 of the drawing. The knob for actuating the lever 51 is disposed upon the inner surface of the door and is diagrammatically outlined at 53 in FIG. 3 of the drawing and at 54 is shown the outer casing portion of the key admission part of the cylinder. Here again, these structures are well-known in the art and, for this reason, no detail showing is made thereof.

It will be understood that operation of the key from the outer surface of the door or manual operation of the doorknob 53 on the inner surface of the door will actuate the lever 51 in movement of the slide 46 from the position shown in full lines in FIG. 2 to the full line showing in FIG. 1 and vice versa. In other words, in FIG. 2, the dead lock bolt 20 is shown in its fully retracted position within the casing 10 and, in FIG. 1, the bolt is shown in its operative position. Also in FIG. 1, I have indicated, in part, in dotted lines, an intermediate movement of the bolt and the slide. In other words, in movement from Fatented June 7, 1966 the position of FIG. 2 to the position of FIG. 1, the bolt 20 first moves to the dotted line position of FIG. 1, note recess 31, FIG. 5, permitting this movement, and, then, in continued movement of the slide, the lock bolt 29 moves into its dead lock position, as shown in full lines in FIG. 1. In like manner, in retracting the bolt 20, it first moves from the full line position of FIG. 1 to the dotted line position of said figure and, then, to the position of FIG. 2.

The striker plate 21 has in alinement with the aperture 24 a housing portion 55 extending into a recessed portion 56 of the doorjamb and secured by screws 57 shown, in part, in FIG. 1 and within this housing portion and as part of the striker plate 21 is a key lug 58, shown, in section, in FIG. 1 and in elevation in FIG. 3 of the drawing. This lug operates in a recess 59 in one surface of the bolt 20, as clearly illustrated in FIGS. 1 and 3 of the drawing. It will appear from a consideration of FIG. 1 that the lug 58 enters the recess 59 when the bolt 20 moves from the dotted line position to the full line position. The opposed surface of the bolt 20 has a recessed portion 60, clearly illustrated in the broken away portion of FIG. 1 and illustrated, in part, in FIG. 6. Pivoted in this recessed portion of the bolt 20 is one end of a link 61, as seen at 62, in FIG. 1 of the drawing. The other end portion of the link is pivoted to the slide, as seen at 63 in FIGS. 2 and 4 of the drawing.

The upper and lower walls 10" of the casing 12 have recesses 64 in their outer surfaces, as clearly seen in FIGS. 1 and 2 of the drawing, in which end portions of a coacting bar or element 65 operate, the outer surface of the bar being flush with the outer surfaces of the walls 10', 10" and the bar operating upon the inner surface of the cover 13, as will clearly appear from a consideration of FIG. 6 of the drawing.

From the foregoing, it will be apparent that, in the' above described movements of the dead lock bolt into its several positions shown in FIGS. 1 and 2, the link 61 first moves the bolt 20 from the FIG. 2 position to the dotted line position of FIG. 1 with bar 65 operating in recess 31, note FIG. 5, and, then, from the dotted line position to the full line position of FIG. 1. In this operation, the coacting bar 65 fitting and operating in a groove 66 in the surface of the bolt 20 is moved from the position shown in FIG. 2 to the position shown in FIGJI. In the upward movement of the bolt 20 by link 61, the key lug 58 is positioned in the recess 59, as seen in FIGS. 1 and 3. In this latter position, it will appear, from a consideration of FIG. 5 of the drawing, that the bar 65 engages a surface 19 of the latch bolt 19 and supports the latch bolt 19 in a locked position and, in this respect, the bar coacts with both of the bolts 19 and 20 in support of the same in the locked positions and this locking is reinforced by the key lug 58 operatively engaging the bolt 20.

Considering FIG. 1 of the drawing, it will appear that a backup and guide member 67 is secured to the wall of the casing 10, the member 67 having an angularly offset backup portion 68, which bears upon the inner surface of the bolt 20, when the bolt 20 is in the dead lock position. However, in the dotted line position of FIG. 1 and the full line position of FIG. 2, the bolt 20 operates beneath the membef 67, which acts as a guide as will clearly appear from a consideration of FIG. 2 of the drawing. Movement of the bolt 20 into its different positions is assured by the coacting bar 65 operating in the grooves 64; whereas, the slide 46 is checked in its forward movement by the stop 45. The bar 65 slides in the casing 12; whereas the bolt 20 moves with the bar 65 and slides on or longitudinally of said bar.

It will be understood that, when the bolt 20 is moved from the full line position of FIG. 1 to the full line position of FIG. 2 and the bar 65 assumes this position, the latch bolt 19 will normally be retained in the position shown in FIG. by the spring 26, the illustration in FIG. 2 being given simply to show the manner of opening a door and, further, that the surface 19' checks inward movement of the latch bolt when operated through the doorknob actuated lever 42.

It will be apparent that the illustrations in the accompanying drawings are somewhat diagrammatic and, particularly, in the showing of some of the parts such, for example, as the key lug 58 in FIG. 1 of the drawing. Clearances will be provided between this lug and the recess or groove 59 in the dead lock bolt for proper alinement and coupling of the bolt with the key lug. Further, as and where necessary, adjustments of the parts can be provided for assuring proper interfitting and cooperation between the parts.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A lock of the character described comprising a casing having a facing plate for mounting the casing in a door, a striker plate for attachment to the doorjamb, said plates having alined apertures for reception of a latch bolt and a dead lock bolt, both of said bolts being slidably mounted in the casing, manual and key actuated means in the casing and in operative engagement with said dead lock bolt for actuating said dead lock bolt, tensional means for normally supporting the latch bolt in projected operative position, manually actuated means accessible on both surfaces of a door in which the easing is arranged for actuating said latch bolt, means slid- -ably mounted in the casing and keyed to said lock bolt for operatively engaging both bolts in support thereof in projected locked position, and said last named means comprising a bar movable longitudinally of both bolts.

2. A lock as defined in claim 1, wherein the striker plate includes a housing portion in which is arranged a key lug, and said dead lock bolt operatively engaging said key lug when in dead lock position.

3. A lock as defined in claim 2, wherein the casing includes a backup member engaging the inner surface of the dead lock bolt when in dead lock position.

4. A look as defined in claim 1, wherein said first named means includes a lever, a slide mounted in the casing, a link operatively coupling the slide with said lock bolt, and said lever operatively engaging the slide in movement of the lock bolt into operative and inoperative positions.

5. A lock as defined in claim 4, wherein actuation of the lock bolt by said lever, slide and link first projects the lock bolt from the casing and then moves the lock bolt longitudinally of the facing plate and striker plate of the'lock.

6. A lock as defined in claim 5, wherein the striker plate and lock bolt include interengaging means for reinforcing coupling of the lock bolt with said striker plate.

7. A lock as defined in claim 6, wherein the casing includes other means engaging the lock bolt in support thereof in operative position.

8. A lock as' defined in claim 1, wherein the latch bolt includes an elongated bar portion arranged in the casing, and said third named means includes a lever operatively engaging the bar portion of the latch bolt in movement of the latch bolt into retracted position within the casing.

9. A lock as defined in claim 1, where said second named means comprises a coil spring mounted in said bar portion, one end of which engages :a pin mounted in the casing, and said bar portion being apertured to move on said pin.

10. A lock as defined in claim 9, wherein the casing includes other means for guiding the latch bolt in its movement in said casing.

11. A lock as defined in claim 1, wherein said last named means operates in recesses in spaced walls of the casing, and said recesses checking movement of said bar in both directions in the casing.

12. A lock as defined in claim 11, wherein said bar operates in a recess in one surface of said lock bolt, and

the casing including a cover plate supporting said bar in the recesses of the casing and the recess of said bolt.

13. In locks of the character defined, a casing, a lock bolt and a latch bolt movably mounted in the casing in spaced relationship to each other, tensional means for moving the latch bolt in one direction, manually actuated means for moving the latch bolt into retracted position, dual means at side surfaces of the casing for controlling movement of the lock bolt into operative and inoperative positions in two paths, namely longitudinally of the latch bolt and at right angles to said latch bolt, at least one of said dual means being key actuated, and a single element movably mounted in the casing operatively engaging both of said bolt-hs in support thereof against movement when in extended operative positions.

References Cited by the Examiner UNITED STATES PATENTS Schwieger 70-1 11 Salata 70142 Angelillo 70--110 'Theleny 70-110 Segal 7 0-l3 1 Wolff 70107 Gutman 70-107 Tucker 70-130 X JOSEPH D. SEERS, Primary Examiner.

BOBBY R. GAY, Assistant Examiner. 

1. A LOCK OF THE CHARACTER DESCRIBED COMPRISING A CASING HAVING A FACING PLATE FOR MOUNTING THE CASING IN A DOOR, A STRIKER PLATE FOR ATTACHMENT TO THE DOORJAMB, SAID PLATES HAVING ALINED APERTURES FOR RECEPTION OF A LATCH BOLT AND A DEAD LOCK BOLT, BOTH OF SAID BOLTS BEING SLIDABLY MOUNTED IN THE CASING, MUTUAL AND KEY ACTUATED MEANS IN THE CASING AND IN OPERATIVE ENGAGEMENT WITH SAID DEAD LOCK BOLT FOR ACTUATING SAID DEAD LOCK BOLT, TENSIONSAL MEANS FOR NORMALLY SUPPORTING THE LATCH BOLT IN PROJECTED OPERATIVE POSITION, MANUALLY ACTUATED MEANS ACCESSIBLE ON BOTH SURFACES OF A DOOR IN WHICH THE CASING IS ARRANGED FOR ACTUATING SAID LATCH BOLT, MEANS SLIDABLY MOUNTED IN THE CASING AND KEYED TO SAID LOCK BOLT FOR OPERATIVELY ENGAGING BOTH BOLTS IN SUPPORT THEREOF IN PROJECTED LOCKED POSITION, AND SAID LAST NAMED MEANS COMPRISING A BAR MOVABLE LONGITUDINALLY OF BOTH BOLTS. 